1) They use different balls
2) Men hit with spin, women hit flat; flatter shots look like they're going faster.

you sure about that? I know they do at the Us Open, and yes guys use more spin, because guys are faster.... Women are MUCH slower than men on a court..therefore as i said the men do more set up to hit their winners than the women do. And Also since the women are slower it'll look like the balls moving alot faster as well.

It's just early on. Once these courts are roughed up a bit, they'll speed up. The courts seem to take well to flat and slice, and aren't too kind to heavy topspin. The women should be fine since none of them hit with the kind of topspin that the men do.